Preloader image for HWP Design & Build

House Extensions in Elmbridge & Surrey

  • 30 years experience
  • 10-year structural guarantee
  • Fixed fee quotation
  • 5% Scheduling discount
  • 500+ Successful projects

Add space, light and value with a carefully planned extension built by one accountable team.

House extension build in Surrey with high-quality finish

Extensions designed around your home and how you live

A well-designed extension should feel like it has always been part of the house. We focus on layout, natural light and finishes that work with the existing architecture—while keeping the build practical and compliant.

From rear and side-return extensions to full wrap-around solutions, we help you choose the right approach for your property type, garden, budget and planning constraints.

If you are exploring your options, you can request a fixed-price quotation or browse recent work in our projects gallery.

Rear extension with glazing and open-plan kitchen
Side return extension detail with roof lanterns

Popular extension types we build

Every home is different. These are the most common extension routes we deliver for homeowners across Surrey and SW London.

Planning, technical design and build

We start with a measured survey and feasibility review, then develop a scheme that balances space, light and cost. Where required, we coordinate planning permission and Building Regulations so you’re covered from the start.

On site, our team manages structure, weatherproofing, electrics, plumbing and finishes with quality control at each stage.

We work across East Molesey, West Molesey, Hampton Court, Kingston upon Thames, Esher, Surbiton, Elmbridge and surrounding Surrey & South West London.

What to expect when extending your home

  • A clear scope, programme and communication plan before we start.
  • Support with neighbours and boundaries, including party wall considerations where applicable.
  • Respectful site management to minimise disruption to your household.
  • A finished space that is warm, efficient and ready to use.

Ready to talk about your project?

Sometimes. Many extensions fall under permitted development, but this depends on the property, location and proposed dimensions. We can advise and handle applications where required.

Timelines vary by size and complexity. We agree a realistic programme before starting and keep you updated as work progresses.

Yes. We coordinate compliant details, inspections and the documentation needed for sign-off.

Well-designed extensions often add significant value, especially when they improve layout, light and energy efficiency.

Yes. We aim to provide fixed-price clarity with a detailed scope so you understand what is included.

Yes. Kitchen extensions are a core part of our work and we can coordinate layouts, services, finishes and installation.